Syncope, defined as a transient loss of consciousness due to global cerebral hypoperfusion, is a common symptom encountered in clinical practice that currently accounts for 0.8% to 2.4% of all ED visits.1 The prognosis of syncope varies according to etiology, with 1-year mortality estimates ranging from 0% among patients with vasovagal syncope to 30% in patients with cardiac syncope.2
Waytz J, Cifu AS, Stern SDC. Evaluation and Management of Patients With Syncope. JAMA. 2018;319(21):2227–2228. doi:10.1001/jama.2017.21992
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